An investigation by an Israeli newspaper has found that the Kushner Foundation, run by the parents of President-elect Donald Trump's son-in-law, Jared Kushner, has donated tens of thousands of dollars to organisations and projects in illegal West Bank settlements.

A smaller donation was made to a settlement yeshiva that had been defunded by the Israeli government after it was found to be the base for extremist attacks on Palestinians and Israeli Security Forces.

The investigation by Haaretz found that the Kushner Foundation had made multiple donations all around $5,000-$10,000 (£3,900-£7,800) to organisations in hard-line settlements. The State Department in America considers settlements built on occupied land to be a impediment to peace.

Jared Kushner, who is married to Trump's daughter, Ivanka, is thought to be an important voice in the president-elect's ear and top adviser to the presidential transition team. The foundation was set up by Kushner's parents, Charles and Seryl Kushner, in 1997 - Kushner and his siblings all sit on the board.

Haaretz found that the foundation donated $20,000 to American Friends of Beit El Yeshiva in 2013. The president of that organisation is David Friedman, Donald Trump's top adviser on Israeli issues.

The foundation also gave $5,000 in 2012 to the Etzion Foundation which supports projects and organisations in the Gush Etzion settlement bloc, in 2013 it gave another $10,000. The Kushners have also given millions to a hospital in Jerusalem, in 2014 pledging $18m to the Shaare Zedek Medical Center.

A smaller donation of $500 went to the Od Yosef Chai yeshiva in Yitzhar, a settlement known for extremist youths who attacked Palestinians and Israeli security forces. The yeshiva was thought to be a base for these violent attacks and was defunded by the Israeli government.

The foundation has also donated to Friends of the IDF, a US based organisation for soldiers in Israel's defence force. Between 2011-2013, the foundation donated $315,000 to the organisation.